I’m looking for a movie but can only remember a handful of details about it:

• The protagonist was a young boy with a disabled younger sister.
• The protagonist really wanted to go to some sort of vacation, Disney Land or Universal Studios maybe?
• The Protagonist was unable to go because his sister got sick I think
• The Protagonist threw had a tantrum and was later found around a tree that was probably blossoming
• The protagonist played baseball in school and I think his sister came to watch one day which I think embarrassed him
• His sister I believe died at the end
• I think it was an old anime